131231111123 has 8 divisors (see below), whose sum is σ = 149985195360. Its totient is φ = 112478722560.

The previous prime is 131231111111. The next prime is 131231111129. The reversal of 131231111123 is 321111132131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131231111123 - 2⁸ = 131231110867 is a prime.

It is a super-2 number, since 2×131231111123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131231111095 and 131231111104.

It is not an unprimeable number, because it can be changed into a prime (131231111129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253508 + ... + 571601.

It is an arithmetic number, because the mean of its divisors is an integer number (18748149420).

Almost surely, 2^131231111123 is an apocalyptic number.

131231111123 is a deficient number, since it is larger than the sum of its proper divisors (18754084237).

131231111123 is an equidigital number, since it uses as much as digits as its factorization.

131231111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847837.

The product of its digits is 108, while the sum is 20.

Adding to 131231111123 its reverse (321111132131), we get a palindrome (452342243254).

The spelling of 131231111123 in words is "one hundred thirty-one billion, two hundred thirty-one million, one hundred eleven thousand, one hundred twenty-three".